What will happen if a solution of sodium hydrocarbonate is heated ? Give the equation of the reaction involved.
When a solution of sodium hydrocarbonate (sodium hydrogencarbonate) is heated, sodium carbonate and water are formed with the evolution of carbon dioxide gas.
$\underset{\begin{smallmatrix}
\,\,\,\,\,\,\,\,\,\,\,\text{Sodium} \\
\text{hydrogencarbonate}
\end{smallmatrix}}{\mathop{2NaHC{{O}_{3}}}}\,\xrightarrow{\Delta }\,$ $\underset{\begin{smallmatrix}
\text{Sodium} \\
\text{carbonate}
\end{smallmatrix}}{\mathop{N{{a}_{2}}C{{O}_{3}}}}\,\,+\underset{\text{Water}}{\mathop{{{H}_{2}}O}}\,\,+\,\underset{\begin{smallmatrix}
\text{Carbon} \\
\text{dioxide}
\end{smallmatrix}}{\mathop{C{{O}_{2}}}}\,\uparrow $
Why should curd and sour substances not be kept in brass and copper vessels ?
What is the common name of the compound $CaOCl_2$ ?
Why does dry $HCl$ gas not change the colour of the dry litmus paper ?
Five solutions $A,\,B,\,C,\,D$ and $E$ when tested with universal indicator showed $pH$ as $4,\,1,\,11,\,7$ and $9$, respectively. Which solution is
$(a)$ neutral ?
$(b)$ strongly alkaline ?
$(c)$ strongly acidic ?
$(d)$ weakly acidic ?
$(e)$ weakly alkaline ?
Arrange the $pH$ in increasing order of hydrogen-ion concentration.
Equal lengths of magnesium ribbons are taken in test tubes $A$ and $B$. Hydrochloric acid $(HCl)$ is added to test tube $A$, while acetic acid $(CH_3COOH)$ is added to test tube $B$. Amount and concentration taken for both the acids are same. In which test tube will the fizzing occur more vigorously and why ?